To take a measurement, simply press the button once. When the light turns to green, Tono-Pen AVIA is ready to use. Gently tap the anesthetized cornea until a short beep sounds to alert the operator that the measurement is complete.

Less Sensitive to Corneal Centration.

Using micro-strain gauge technology, Tono-Pen AVIA is less sensitive to corneal centration than other tonometers and provides fast, accurate, and repeatable results with minimal operator bias.